F-Term-List

H04B1/76-3/44;3/50-3/60;7/005-7/015

AA00
TRANSMISSION LINE

AA01

AA02

AA03

AA04

AA05

AA06

AA07

AA08

AA09

. Cable transmission line

. . Cable shielding layer

. . Power line

. . . Earthing conductor

. Radio transmission line

. Radio waveguide

. Optical transmission line Example: Space transmission line

. . Optical fiber

. Cable transmission line + Radio transmission line

BA00
PURPOSE

BA01

BA02

BA03

BA04

BA05

BA06

BA07

. Simplification, miniaturization, densification and integration

. Reduction in the number of wiring

. Sharing

. Compensation for temperature variation

. Prevension of malfunction

. Acceleration

. Power saving and low power consumption

BB00
APPLICATION

BB01

BB02

BB03

BB04

BB05

BB06

. Phone and conference phone

. . Intercom

. TV and CATV

. Facsimile

. Data communications

. Remote control and indoor load control

CC00
DETAILS OF TRANSMISSION SYSTEM

CC01

CC02

CC03

CC04

CC05

CC06

CC07

CC08

CC09

CC10

. Combination, connection, branch, separation and division

. . Branching-off, branching filter and mixer

. . Directional coupler

. . Balanced and unbalanced conversion circuit

. . Outlet unit

. . Element

. . . Magnetoelectric element

. . . Capacitor

. . . Coil and transformer

. . . Piezo-electric element

CC11

CC12

CC14

CC15

CC16

CC17

CC18

. . . Optical element

. . . Mechanical element

. Electric power supply

. . Electric power supply to repeater and relay station

. . Electric power supply to remote unit and remote station

. . Separation between signal and electric power

. . Remote activation and shutdown of electric power supply

CC21

CC22

CC23

CC24

CC25

CC26

CC27

CC28

CC29

CC30

. Reflex inhibition

. . Terminal impedance

. . Adjustment of line length

. Load

. Processing and countermeasure for the leak current generated in transmission path

. Processing of unbalanced signals generated in balanced line

. Artificial line

. Reduction of crosstalk and interference

. Reduction of singing

. . Gain adjustment and control of loss

DD00
LEVEL CONTROL

DD01

DD02

. Transmission level control

. Reception level control

DD11

DD12

DD13

DD14

DD15

DD16

DD17

DD18

DD19

DD20

. Level detection and control method

. . Setup of receiving sensitivity

. . Gain control of amplifier

. . . Use of pilot and test signal, etc.

. . . Generation of gain control signal

. . . . Peak AGC

. . . . Mean value AGC

. . . Compression of amplitude level

. . Setup of impedance

. . Selection optimal gain and optimal amplifier

DD21

DD22

DD23

DD24

DD25

DD27

DD28

DD29

. Improvement in the stability of level control

. . Mode switching

. . State holding

. . Countermeasure against anomalies in pilot signal and test signal, etc.

. . Noise processing and countermeasure

. Improvement in response speed and operating speed

. Display, alarm and surveillance

. Control of level setting between master and slave stations

EE00
EQUALIZATION IN GENERAL

EE01

EE02

EE03

EE04

EE05

EE06

EE07

EE08

EE09

EE10

. Configuration of equalizer

. . BY using longitudinal delay line

. . By using parallel delay line

. . Two-dimensional arrangement

. . Variable equalizer

. . Automatic equalizer

. . Vamp type equalizer

. . Cosine type equalizer

. . Cyclic equalizer

. . Decision feedback type equalizer

EE11

EE12

EE13

EE14

EE15

EE16

EE17

EE18

EE19

. . Variable resonance type equalizer

. . Inclined type equalizer

. . Bridged tap equalizer

. . Multistage and multiplex configuration

. . . Selection of optimal equalizer or number of stages

. . . Combination of different equalizers and different functions

. . . Gradual processing accompanied by coarse adjustment

. . Distortion compensation circuit by using termination circuit etc.

. . Distortion compensation circuit by using equalization compensation signal

EE21

EE22

EE23

EE24

. . Circuit elements

. . . Distributed constant elements

. . . Lumped constant elements

. . . . Switched capacitor

EE31

EE32

EE33

EE34

EE35

EE36

EE37

. Types of equalized signal

. . Baseband

. . . Bipolar

. . . Multi-value pulse

. . . Partial response

. . Passband

. . . Quadrature modulation signal

EE41

EE42

EE43

EE45

EE46

EE47

EE48

EE49

EE50

. Distortion detection scheme

. . Use of a test signal etc.

. . Use of plural filters with different bandwidth

. Equalization scheme

. . Route f equalization

. . Equalization of intersymbol interference

. . . Frequency control

. . . Selection of optimal threshold level

. . Equalizaion of (group) delay distortion

EE51

EE52

EE53

EE54

EE55

EE56

EE57

EE59

. . Compensation of nonlinear distortion

. . . Precompensation

. . . By using odd function input/output characteristic circuit

. . . . Generating circuit of parameter control signal

. . . Phase control

. . Equalization of fading

. . Equalization of sneak signal

. . Pre-equalization

EE61

EE62

EE63

EE64

EE65

. Prevention from malfunction

. Removal of a test signal etc.

. Remote control of equalizer

. Detection and processing in case of incompetence of equalization

. Announcement and display

EF00
AUTOMATIC EQUALIZATION

EF01

EF02

EF03

EF04

EF05

EF06

EF07

EF08

. Setup initial value

. Training

. . Sending of pseud random signal

. . Solitary wave and sending of impulse

. . Discrimination and extraction of signal

. . Individual training of plural equalizers

. . Shortning of training time

. . Adjustment of length of training signal

EF11

EF12

EF13

EF15

EF16

EF17

EF18

EF19

EF20

. Scheme for coefficient correction

. . ZF method

. . MSE method

. Improvement of convergence time

. . Improvement of correlation

. . Switchover of correction method

. . With fixed central tap

. . Reduction in the number of times of correction

. . Adjustment of step gain

EF21

EF22

EF23

EF24

EF26

EF27

EF28

EF29

. . Gradual adjustment of the number of taps

. . Nonlinear coding and logarithmic operation

. . Use of coefficient memory

. . Use of microprocessor

. Improvement of convergence stability

. . By using auxiliary delay line

. . Measures agaist runaway

. . Measures against incorrect convergence and pseud convergence

EF31

EF32

EF33

EF34

EF35

EF36

EF37

EF38

EF39

EF40

. . Measures against divergence and runaway

. . . Detection of divergence and runaway

. . . . Dephasing

. . . . Coefficient surveillance

. . . Processing of divergence and runaway

. . . . Coefficient reset

. . . . Halt of coefficient adjustment

. . . . Previous value holding

. . . Prevention of divergence and runaway

. . . . Adjustment of step gain

EF41

EF42

EF43

EF44

EF46

EF48

EF49

. . . . . Leak

. . . . Setup of dead zone for drawing-in

. . . . Correction of coefficient depending only on amplitude (or phase) error

. . . . Switchover to the standard value of error

. Improvement of convergence accuracy

. Measures against finiteness in tap number

. . Broadband equalization

EF51

EF52

EF53

EF54

EF55

EF56

. Adjustment and processing other than tap coefficients

. . Compensation of phase variation

. . . Dephasing

. . . Frequency offset

. . DC offset

. . Compensation for tap gain variation

GG00
2-WIRE/4-WIRE CONVERSION

GG01

GG02

GG03

GG04

GG05

GG06

GG07

GG08

. Configuration of hybrid circuit

. . Transformer hybrid

. . Configuration of electronic circuit

. . Optical hybrid

. . Method of connection

. . . Bridge

. . . Y shape

. . . Triangle shape

GG11

GG12

GG13

GG14

GG15

GG16

GG17

. Balanced circuit network

. . Detection of impedance variation

. . . Waveform comparison

. . . Measurement of the amount of sneaking

. . . Measurement of the degree of balance

. . . Measurement of the DC power (current) variation

. . Method of selection operation

GG22

GG23

GG24

GG25

. . Configuration of balanced circuit network

. . . By using switched capacitor

. . . Being combined with terminal impedance

. . . . With feedback circuit

HH00
REDUCTION OF ECHO

HH01

HH02

HH04

HH05

HH06

HH07

HH08

HH10

. Cancel

. . Cancellation by using selection of optimal filter

. . Preset type cancellation

. . . Transmission of a test signal etc.

. . . . Sweep signal and chirp signal

. . . . White noise

. . . . Tone signal

. . By utilizing false echo waveform memory

HH11

HH12

HH13

HH14

HH15

HH16

HH18

HH19

HH20

. . Cancellation by synthesis of false echo

. . . Preprocessing

. . . . Amplitude limitation and compression

. . . . Compensation of phase distortion

. . . . Compensation and correction of delay

. . . Re-setting of initial value of coefficient

. . . Scheme of coefficient correction

. . . . Learning identification method

. . . . Steepest descent method

HH22

HH24

HH25

HH26

HH27

HH28

HH29

HH30

. . . Mitigation of operation processing speed and adjustment of operation timing

. . . Improvement of convergence speed, reduction in computation and simplification of

. . . . Improvement of mutual cerrelation

. . . . Processing of only the response part of regular inpulse

. . . . Reduction of the number of correction

. . . . Nonlinear codeing and logarithmic operation

. . . . Use of coefficient memory

. . . . Use of microprocessor

HH31

HH32

HH33

HH34

HH35

HH37

HH39

. . . Improvement of convergence stability

. . . . Measures against runaway

. . . . Measures against false convergence

. . . . Measures against divergence

. . . . . Adjustment of step gain

. . . Improvement in convergence accuracy

. . . Correction of coefficient during double talk

HH41

HH42

HH43

HH44

HH45

HH46

HH47

. . Reserve of fixed amount for cancellation

. . Processing of residual echo after cancellation

. . Processing of jitter

. . Discrimination and detection of double-talk, etc.

. . . Double-talk

. . . Voice and non-voice

. . . Echo path variation

HH51

HH52

HH53

HH54

HH55

HH56

HH57

HH58

HH59

HH60

. . Circuit configuration

. . . By using cyclic filter

. . . By using non-cyclic filter

. . . By using nonlinear filter

. . . By using AD and DA converters

. . . Multi-step, longitudinal connection and plural cancellors

. . . . Division of bandwidth

. . . . Sequential processing

. . . . Combination of different filters

. . . Canceller shared by multiple lines

HH61

HH62

HH63

HH64

HH66

HH68

HH69

. Suppress

. . Prevention from voice cutting

. . Discrimination and detection of double-talk

. . Suppressor shared by multiple circuits

. Pitch control

. Combination of echo processing technologies

. . Cancellor and suppressor

HH71

HH72

HH73

HH74

HH76

HH77

HH78

HH79

HH80

. Noise processing

. Disable/active control

. Measures against failure and malfunction

. Prevention of malfunction

. Types of echo

. . Far-end echo

. . Near-end echo

. . Acoustic echo

. . Nonlinear echo

KK00
REPEATER

KK01

KK02

KK03

KK04

KK05

KK06

KK07

KK08

KK09

KK10

. Two-way repeater

. . By using different frequency

. . Direction change

. . 2-wire system

. Direct shift and heterodyne repeater

. Regenerative repeater

. Optical repeater

. Combination of different repeaters and functions

. . Regenerative relay and non-regenerative relay

. . Unbalanced amplifier and balanced amplifier

KK11

KK12

KK13

KK15

KK16

KK17

. Circuit configuration

. . Repeater configuration consisting of multistage amplifier

. . Sharing of configuration (e.g., amplifier)

. Structure

. . Characterized by the structure of heat variation

. . Characterized by buffer and proof-pressure

PP00
TRANSMISSION METHOD IN GENERAL

PP01

PP02

PP03

PP04

PP05

PP06

PP07

PP08

PP09

. Simultaneous transmission of power supply and signal

. . Sending DC power (current and voltage)

. . Time division transmission of electric power and signal

. Multiplex transmission system and multichannelizing

. . Duplex communication

. Bidirectional transmission

. . Current-voltage

. . By using different frequency

. Analog transmission + digital transmission

PS00
POWER LINE CARRIER SYSTEM

PS01

PS02

PS03

PS05

PS06

PS07

PS08

PS09

. Types of signal transmission

. . Pulse system

. . Frequency system

. Injection and detection of signal

. . Method of injection and detection

. . . Zero phase injection and detection

. . . Zero-phase injection and detection

. . . Measures against standing wave

PS11

PS12

PS13

PS14

PS15

PS16

PS17

PS18

. . Injection, detection circuit and means

. . . Series injection and detection

. . . Parallel injection and detection

. . . By using thyristor

. . . By using variable impedance, etc.

. . . By using resonance circuit and detector circuit, etc.

. . . By using magnetic field type coupler

. . . By using optical device

PS21

PS22

PS23

PS24

PS25

PS26

PS27

PS29

PS30

. Prevention from leaking, sneaking-in and backward flow

. Between power source and system

. . Between systems

. . By using blocking coil

. Humping circuit

. Return method

. . Ground return method

. Announcement and display

. Structure

PS31

PS32

PS33

PS34

PS36

PS37

PS38

PS39

PS40

. Communications between master unit and slave unit and between slave units

. . Communications between different phases, and between other circuits

. . Communications by using 2 or 3 phases

. . Communication by way of repeater (relay station)

. . Code configuration and bit setup

. . . Existence or non-existence of high frequency

. . . Combination of two frequencies

. . Channel assignments for code and bit

. . Signal formmat

PS41

PS42

PS43

PS44

PS45

PS46

PS47

PS48

PS49

PS50

. . Control of transmission and reception

. . . Synchronization

. . . Being accompanied by confirmation and surveillance

. . . . Confirmation of reception

. . . . Confirmation of possibility of transmission

. . . Selective reception

. . . . Address match

. . . . Frequency selection

. . . Error control

. . . Input/output impedance control

PS51

PS52

PS53

PS54

PS55

PS57

. . Measures against undesired signals such as noise, and processing

. . . Discrimination between noise and regular signal

. . . Phase selection and segment selection

. . . Noise cancellation

. . . Utilization of spread spectrum transmission system

. . Prevention of malfunction

YY00
STATION-TO-STATION COMMUNICATION

YY01

YY02

YY04

YY05

. Communication between fixed stations

. . Processing before transmitting signals and 2-wire transmission unit

. Communications between relatively movable stations

. . Communication with lift

ZZ00
FAILURE AND OBSTACLE

ZZ01

ZZ02

ZZ03

ZZ04

ZZ05

ZZ07

ZZ09

. Measures and processing for overvoltage and overcurrent

. . By using arrester

. . Types of overvoltage and overcurrent

. . . Lightning surge

. . Detection of overvoltage and over-current

. Measures against static electricity

. Measures against earth potential difference

ZZ11

ZZ13

ZZ15

ZZ16

ZZ17

ZZ19

. Detection and processing of breaking of wire, short circuit and ground fault

. Measures and processing of incorrect connection and incorrect wiring

. Measures and processing for apparatus failure

. . Examination

. . Bypass and separation

. Alarm and display of alarm

5K046	CABLE TRANSMISSION SYSTEMS, EQUALIZATION OF RADIO AND REDUCTION OF ECHO
	H04B1/76 -3/44;3/50-3/60;7/00-7/015